Method of bending angle-iron



( No Model.) r

M. MOSLER.

METHOD OF BENDING ANGLE Patented Augg l l, 1883.

sary to make to admit of the bar being bent.

bend, has a dovetailed shape bounded by curved UNITED STATES P TENT OFF cE.

"MosEs MosLnn, or CINCINNATI, onro.

METHOD OF BENDING ANGLE-IRON;

SPECIFICATION forming part ofLetters Patent No. 283,136, dated August 14, 1883. Application filed December 11 188:2. (No model) 1T0 all whom "it may concern.-

'of Cincinnati, county of Hamilton, State of Be it known that I, Mosns MosLER, a citizen of the United States, residing at the city Ohio, have invented certain new and useful Improvements in Bending Angle Irons, of which the following is a specification;

This invention relates to a means for bend: ing angle-bars. It consists in cutting away one web of the angle-bar opposite that portion of the uncut web which is to be bent to form a round corner, so as to permit the uncut web to bend freely and the severed edges or portions to abut againsteachother when the angle-bar is bentr In the accompanying drawings, in which I similar. reference-letters indicate like parts wherever'they occur, Figure 1 is a plan view of an angle-barliaving one of itssides cut out to permit theuncut side to bend around the bar or corner, when'bent being represented in dotted line. Figs. 2, 3, and 4. show in plan view different forms of openings or notches in one side of the angle-bar, which will permit the bar to bend and leave a close joint between the abutting edges as they are brought together to form a round cornered frame. Fig. 5 represents a templet of cardboard or thin sheet metal which I use to determine about the shape and size of the notch or out which it is neces to any desired angle and to make a corner of any desired curve- Fig. 6 represents, in-per spective, a simple device which I usetobcnd ,is cut away by a punching-tool of suitable shape in front of that portion of web A which is to be bent. As represented in Fig. 1, the

outer opening, 0, is made by lines at angles of forty-five degrees to the edge of the web,

so that when the bar is bent theedges of this opening meet each other in a true miter. The

inner opening, D, whichfpermits the bar to ends of the web B abut against the uncut side when the bar is bent, as represented in dotted.

side of thisline or. cut 6.

line, Fig. 1-, and in full line, Fig. 3, thus making a close joint.

f Fig. 2 represents a corner formed by severing the web B with a cut, one edge of which is at right anglesto the edge of the web, and the opposite edge by a circular cut, which is the same curve as the inner curve of corner,

that portion of web B between these lines and tended beyond the space bounded by the rounded corner and the edgerlines extended to web A. The miter-line being taken as the central,

dividingline, whatever shape is cut away from web B upon one side of this line the counterpart must be left upon that part of the web upon the other side. If, for instance, thesmall circular projection shown in dotted line, Fig. 8; be left upon one side of the miter-line, a corresponding circular opening must be cut out of the web upon the opposite side of the line in this case as well as in the form shown in full line, Fig. 4. The projecting piece must be bent back until the-other parts are brought together, when it is driven into the opening and locks the bar firmly together. I have shown in dotted line, Fig. 4', another form of joint'similar to the one shown in Fig. 3.

The templet shown in Fig. 5. is a thin sheetmetal or cardboard angle-piece. Oneweb of this I sever by acut, e, at right angles to the edge (I of one web. The two webs are severed attheir junction for some distance upon each I Now, by bending the web B so that the cut edges will pass each other the templet may be bent around to any curve desired and to any angle, the corners ofthe severedweb passing underneath the uncut side and one'part of web B overlapping the other. Whenthe templet is bent to the proper angle and the corner of the size desired, it is secured in position, while the web B is severed on a line with the inner curve of the corner, and an other out from the inner angle of the edges through the overlapping parts of the templet to any part of curved corner of to fit the inner curve of the desired corner.

G is a loose block of iron, between which and the side of block E the uncutweb A is clamped by screw F; the other web, B, resting on the block, the cut-away part over the rounded .corner; by force applied to the projecting end of the bar it is bent around until the severed edges meet in a close joint.

The angle-bar herein shown is not claimed here, as it is the subject ofa pending application.

What I claim herein and desire to secure by Letters Patent, isj V The herein described process of bending angle-irons which consists in cutting away a portion of one web by a out which severs the two webs at their junction for a distance equal to the arc of the corner to be bent, and removes sufficient of metal in front of the single partof the uncut web to permit the same to bend to the desired angle and to insure the edges of the opening meeting to form'a close joint as the bar is bent, substantially as shown and described. 1

MosEs MOSLER.

Witnesses GEo. J. MURRAY, J our; CRANE. 

